This past Friday I spent the evening at the National Portrait Gallery; at least it felt like evening since it was dark the entire time(they're open until 7pm)
If you haven't visited you really must;it's one of my favorite museums in DC. Housed in the old Patent office building completed in 1840, the Greek Revival structure was the 3rd public building constructed in the United States.
The third floor is a stunning open space which was restored a number of years ago. When built it was the largest room in the United States! President Lincoln held his 2nd inaugural ball here.
The art is thoughtfully displayed throughout the structure to show off not only the art but take best advantage of the architecture. Enfilades are carefully ended in works of art. Symmetry is key here and nothing is left to chance with a work's placement within the building.
Sometimes the shadows are more interesting than the work itself!
I've always admired the settings and 'rooms' created around special works of art. The alcove above is decorated as if one were in a cemetery.